Control Structures (Part - 1)
1. What will be the output of the following C code?
1. #include <stdio.h>
2. void main()
3. {
4. int x = 5;
5. if (x < 1)
6. printf("hello");
7. if (x == 5)
8. printf("hi");
9. else
10. printf("no");
11. }
a) hi
b) hello
c) no
d) error
Answer: a
2. What will be the output of the following C code?
1. #include <stdio.h>
2. int x;
3. void main()
4. {
5. if (x)
6. printf("hi");
7. else
8. printf("how are u");
9. }
a) hi
b) how are you
c) compile time error
d) error
Answer: b
3. What will be the output of the following C code?
1. #include <stdio.h>
2. void main()
3. {
4. int x = 5;
5. if (true);
6. printf("hello");
7. }
a) It will display hello
b) It will throw an error
c) Nothing will be displayed
d) Compiler dependent
Answer: b
4. What will be the output of the following C code?
1. #include <stdio.h>
2. void main()
3. {
4. int x = 0;
5. if (x == 0)
6. printf("hi");
7. else
8. printf("how are u");
9. printf("hello");
10. }
a) hi
b) how are you
c) hello
d) hihello
Answer: d
5. What will be the output of the following C code?
1. #include <stdio.h>
2. void main()
3. {
4. int x = 5;
5. if (x < 1);
6. printf("Hello");
7.
8. }
a) Nothing
b) Run time error
c) Hello
d) Varies
Answer: c
6. What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard
input)
1. #include <stdio.h>
2. void main()
3. {
4. double ch;
5. printf("enter a value between 1 to 2:");
6. scanf("%lf", &ch);
7. switch (ch)
8. {
9. case 1:
10. printf("1");
11. break;
12. case 2:
13. printf("2");
14. break;
15. }
16. }
a) Compile time error
b) 1
c) 2
d) Varies
Answer: a
7. What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard
input)
1. #include <stdio.h>
2. void main()
3. {
4. char *ch;
5. printf("enter a value between 1 to 3:");
6. scanf("%s", ch);
7. switch (ch)
8. {
9. case "1":
10. printf("1");
11. break;
12. case "2":
13. printf("2");
14. break;
15. }
16. }
a) 1
b) 2
c) Compile time error
d) No Compile time error
Answer: c
8. What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard
input)
1. #include <stdio.h>
2. void main()
3. {
4. int ch;
5. printf("enter a value between 1 to 2:");
6. scanf("%d", &ch);
7. switch (ch)
8. {
9. case 1:
10. printf("1\n");
11. default:
12. printf("2\n");
13. }
14. }
a) 1
b) 2
c) 1 2
d) Run time error
Answer: c
9. What will be the output of the following C code? (Assuming that we have entered the value 2 in the standard
input)
1. #include <stdio.h>
2. void main()
3. {
4. int ch;
5. printf("enter a value between 1 to 2:");
6. scanf("%d", &ch);
7. switch (ch)
8. {
9. case 1:
10. printf("1\n");
11. break;
12. printf("Hi");
13. default:
14. printf("2\n");
15. }
16. }
a) 1
b) Hi 2
c) Run time error
d) 2
Answer: d
10. What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard
input)
1. #include <stdio.h>
2. void main()
3. {
4. int ch;
5. printf("enter a value between 1 to 2:");
6. scanf("%d", &ch);
7. switch (ch, ch + 1)
8. {
9. case 1:
10. printf("1\n");
11. break;
12. case 2:
13. printf("2");
14. break;
15. }
16. }
a) 1
b) 2
c) 3
d) Run time error
Answer: b
1. What will be the output of the following C code?
1. #include <stdio.h>
2. int main()
3. {
4. int x = 1;
5. if (x > 0)
6. printf("inside if\n");
7. else if (x > 0)
8. printf("inside elseif\n");
9. }
a) inside if
b) inside elseif
c)
inside if
inside elseif
d) compile time error
Answer: a
2. What will be the output of the following C code?
1. #include <stdio.h>
2. int main()
3. {
4. int x = 0;
5. if (x++)
6. printf("true\n");
7. else if (x == 1)
8. printf("false\n");
9. }
a) true
b) false
c) compile time error
d) undefined behaviour
Answer: b
3. What will be the output of the following C code?
1. #include <stdio.h>
2. int main()
3. {
4. int x = 0;
5. if (x == 1)
6. if (x == 0)
7. printf("inside if\n");
8. else
9. printf("inside else if\n");
10. else
11. printf("inside else\n");
12. }
a) inside if
b) inside else if
c) inside else
d) compile time error
Answer: c
4. What will be the output of the following C code?
1. #include <stdio.h>
2. int main()
3. {
4. int x = 0;
5. if (x == 0)
6. printf("true, ");
7. else if (x = 10)
8. printf("false, ");
9. printf("%d\n", x);
10. }
a) false, 0
b) true, 0
c) true, 10
d) compile time error
Answer: b
5. What will be the output of the following C code?
1. #include <stdio.h>
2. int main()
3. {
4. int x = 0;
5. if (x == 1)
6. if (x >= 0)
7. printf("true\n");
8. else
9. printf("false\n");
10. }
a) true
b) false
c) Depends on the compiler
d) No print statement
Answer: d
6. The C statement “”if (a == 1 || b == 2) {}”” can be re-written as ___________
a)
if (a == 1)
if (b == 2){}
b)
if (a == 1){}
if (b == 2){}
c)
if (a == 1){}
else if (b == 2){}
d) none of the mentioned
Answer: d
7. Which of the following is an invalid if-else statement?
a) if (if (a == 1)){}
b) if (func1 (a)){}
c) if (a){}
d) if ((char) a){}
Answer: a
8. What will be the output of the following C code?
1. #include <stdio.h>
2. int main()
3. {
4. int a = 1;
5. if (a--)
6. printf("True");
7. if (a++)
8. printf("False");
9. }
a) True
b) False
c) True False
d) No Output
Answer: a
9. What will be the output of the following C code?
1. #include <stdio.h>
2. int main()
3. {
4. int a = 1;
5. if (a)
6. printf("All is Well ");
7. printf("I am Well\n");
8. else
9. printf("I am not a River\n");
10. }
a) Output will be All is Well I am Well
b) Output will be I am Well I am not a River
c) Output will be I am Well
d) Compile time errors during compilation
Answer: d
10. What will be the output of the following C code?
1. #include <stdio.h>
2. int main()
3. {
4. if (printf("%d", printf(")))
5. printf("We are Happy");
6. else if (printf("1"))
7. printf("We are Sad");
8. }
a) 0We are Happy
b) 1We are Happy
c) 1We are Sad
d) compile time error
Answer: d
